Question

Can someone please provide an answer with an explanation please?

Answer 1

7 is the card that must be removed.

Explanation:

2 + 5 + 8 + 9 = 24 and dividing it by four (which is something you have to do when finding the average or mean) will get you 6 as an answer. So by getting rid of 7 you have a final mean as 6.